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United States Patent | 5,015,535 |
Marquez ,   et al. | May 14, 1991 |
The present invention relates to a ferrous article suitable for use in devices for burning heavy and extra heavy petroleum fuels and a process for forming such an article. The article has a matrix formed from a low carbon steel and a corrosion resistant chromium-aluminum diffusion coating on at least one surface. The coating is formed by subjecting the matrix to successive aluminization and chromization pack cementation treatments.
Inventors: | Marquez; Edmundo M. (Caracas, VE); Nowak; Jean-Francois (Etienne, FR); Robles; Antonio (Miranda, VE) |
Assignee: | Intevep, S.A. (Caracas, VE) |
Appl. No.: | 520721 |
Filed: | May 9, 1990 |
Current U.S. Class: | 428/610; 428/653; 428/941 |
Intern'l Class: | B32B 015/18 |
Field of Search: | 428/610,653,941 |
3061462 | Oct., 1962 | Samuel | 428/591. |
3096205 | Jul., 1963 | De Guisto | 428/653. |
3403988 | Oct., 1968 | Carter | 428/610. |
3467545 | Sep., 1969 | Carter | 428/653. |
3762884 | Oct., 1973 | Grisaffe et al. | 428/610. |
3779719 | Dec., 1973 | Clark et al. | 428/941. |
3907611 | Sep., 1975 | Sasame et al. | 428/610. |
4394422 | Jul., 1983 | Van Thyne et al. | 428/610. |
4467016 | Aug., 1984 | Baldi | 428/667. |
Foreign Patent Documents | |||
688675 | Jun., 1904 | CA | 427/253. |
55-82772 | Jun., 1980 | JP | 428/651. |
797326 | Jul., 1958 | GB | 427/253. |